FISH Analysis with Culture

Fluorescence In Situ Hybridization (FISH) may be used to confirm and/or detect microdeletions and duplications identified by microarray or G-banded chromosome analysis.  This test is appropriate for affected individuals with a cytogenetic finding that needs confirmatory testing.  This test is also appropriate for parents and other relatives of an individual with a cytogenetic abnormality confirmed by FISH. 

FISH analysis is performed on cultured peripheral blood lymphocytes using a probe corresponding to a specific microdeletion/duplication region identified by microarray or G-banded chromosome analysis.

EGL performs FISH analysis using both standard and custom probes.  EGL's standard probes are listed below.  EGL can also create custom probes for any region of the genome to be used for microarray confirmation or family studies. 

• Wolf-Hirschhorn (4p-)
• Cri-du-Chat (5p-)
• Williams (7q11.2 del)
• Prader-Willi/Angelman
• Smith-Magenis (17p11.2 del)
• Miller-Dieker, lissencephaly (17p13)
• 17q21 Microdeletion Syndrome
• 22q11.2 deletion, DiGeorge/VCF
  

Type: Whole Blood

Specimen Requirements:

5 ml blood in a sodium heparin (green top) tube.

Specimen Collection and Shipping: Ship sample at room temperature for receipt at EGL within 24 hours of collection. Do not refrigerate or freeze.

• Chromosomal Microarray: [EmArray Cyto (VA), EmArray Cyto + SNP (CMSNP), EmArray Cyto POC (CMPOC), and EmArray Cyto Prenatal (CMPRE)]
• Chromosome Analysis: [blood (CA, CB), skin (CSKNC), CVS (CV), amniotic fluid (AD), POC (CO), PUBS (CP)

Requisition Forms

• Targeted Testing Test Requisition Form
• Comprehensive Cytogenetic Test Requisition Form

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